TH.2025.03.011]
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基于ESP32的负荷测量仪的设计与应用()

《工业仪表与自动化装置》[ISSN:1000-0682/CN:61-1121/TH]

Author(s):: XU Guangwen; ZHAO Yan; WANG Yanxia; ZHOU Lichong; (Institute of Metrology of Hebei Province，Hebei Shijiazhuang 050000,China)

Keywords:: communication motivation; load measurement; interpolation equation; temperature compensation

摘要:: 采用对负荷传感器外加交流激励源的方法，有效抑制了测量过程中系统的失调电压和热电偶效应引入的测量误差；使用传感器激励源和ADC参考电压相关联的应变比率测量电路，消除ADC参考电压温漂和波动引入的干扰；通过曲线拟合的方法对ADC非线性和系统温漂进行补偿，减少了ADC非线性和系统温漂引入的测量误差；根据负荷传感器特性选择特定点对传感器进行标定并存储标定数据，测量过程中根据通道编号自动读取标定数据，通过内插方程计算测量值。在力标准机装置上对仪表和传感器进行测试验证，结果表明其具有较小的测量误差和较好测重复性。

Abstract:: The method of adding an AC excitation source to the load sensor effectively suppresses the measurement errors caused by the system’s offset voltage and thermocouple effect during the measurement process; Using a ratio measurement circuit that correlates the sensor excitation source with the ADC reference voltage to eliminate interference caused by temperature drift and fluctuations in the ADC reference voltage; Compensating for ADC nonlinearity and system temperature drift through curve fitting reduces measurement errors introduced by ADC nonlinearity and system temperature drift; Select specific points based on the characteristics of the load sensor to calibrate the sensor and store calibration data. During the measurement process, the calibration data is automatically read based on the channel number, and the measurement value is calculated through interpolation equations. The instruments and sensors were tested and verified on the force standard machine device, and the results showed that it had small measurement errors and good measurement repeatability.

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备注/Memo:: 收稿日期：2024-09-23第一作者：许广文（1982—），男，河北石家庄人，大学本科，高级工程师，研究方向为测试计量技术与仪器。

更新日期/Last Update: 1900-01-01